Role of spin-orbit splitting and dynamical fluctuations in the Si(557)-Au surface |
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Authors: | Sánchez-Portal Daniel Riikonen Sampsa Martin Richard M |
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Affiliation: | Unidad de Física de Materiales CSIC-UPV/EHU, Donostia International Physics Center, and Departamento de Física de Materiales, Universidad del País Vasco, Apdo. 1072, 20080 Donostia, Spain. sqbsapod@sc.ehu.es |
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Abstract: | Our ab initio calculations show that spin-orbit coupling is crucial to understand the electronic structure of the Si(557)-Au surface. The spin-orbit splitting produces the two one-dimensional bands observed in photoemission, which were previously attributed to spin-charge separation in a Luttinger liquid. This spin splitting might have relevance for future device applications. We also show that the apparent Peierls-like transition observed in this surface by scanning tunneling microscopy is a result of the dynamical fluctuations of the step-edge structure which are quenched as the temperature is decreased. |
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